Journal Article10.1107/S0108270107020914
Dimethyl 2,2′‐bipyridine‐6,6′‐dicarboxylate and bis(dimethyl 2,2′‐bipyridine‐6,6′‐dicarboxylato‐κ2N,N′)copper(I) tetrafluoroborate
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TL;DR: The single-crystal X-ray structures of dimethyl 2,2'-bipyridine-6,6'-dicarboxylate, C(14)H(12)N(2)O(4), and the copper(I) coordination complex bis(dimethyl 2-bipiridine- 6,6-dicrboxylato-kappa( 2)N,N')copper( I) tetrafluoroborate,
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Abstract: The single-crystal X-ray structures of dimethyl 2,2'-bipyridine-6,6'-dicarboxylate, C(14)H(12)N(2)O(4), and the copper(I) coordination complex bis(dimethyl 2,2'-bipyridine-6,6'-dicarboxylato-kappa(2)N,N')copper(I) tetrafluoroborate, [Cu(C(14)H(12)N(2)O(4))(2)]BF(4), are reported. The uncoordinated ligand crystallizes across an inversion centre and adopts the anticipated anti pyridyl arrangement with coplanar pyridyl rings. In contrast, upon coordination of copper(I), the ligand adopts an arrangement of pyridyl donors facilitating chelating metal coordination and an increased inter-pyridyl twisting within each ligand. The distortion of each ligand contrasts with comparable copper(I) complexes of unfunctionalized 2,2'-bipyridine.
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Citations
6,6′-Dimethylsulfinyl-2,2′-bipyridine: crystal structure and Hirshfeld surface analysis
Ewa Rozycka-Sokolowska,Bernard Marciniak,Justyna Ławecka,Bogdan Bujnicki,Józef Drabowicz,Andrzej Rykowski +5 more
TL;DR: The structure of 6,6′-dimethylsulfinyl-2,2′-bipyridine (1) has been determined by a single-crystal X-ray crystallography as discussed by the authors.
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A new nitrogen rich open chain diazine ligand system: synthesis coordination chemistry and magneto-structural studies
Muhammad U. Anwar,Ahmed Al-Harrasi,Emma L. Gavey,Melanie Pilkington,Jeremy M. Rawson,Laurence K. Thompson +5 more
TL;DR: Magnetic studies reveal the presence of moderate to strong antiferromagnetic interactions in complexes 1-4 while a mix of ferromagnetic and antiferromeagnetic interactions is observed in complex 5.
Lanthanoid Luminophores with Linear, Bipyridine-Based Antenna Ligands
Christian Kruck,Timo Neumann,Alexander Schäfer,Elisabeth Kreidt,Patrick Weis,Christof Holzer,Manfred M. Kappes,Michael Seitz,Christian Kruck,Timo Neumann,Alexander Schäfer,Elisabeth Kreidt,Patrick Weis,Christof Holzer,Manfred M. Kappes,Michael Seitz +15 more
Abstract: A new, linear octadentate chelator, "en-pypa," based on 2,2'-bipyridine-6-carboxylic acid, has been developed. This ligand can bind trivalent lanthanoids (e.g., Sm, Eu, Tb, Dy, Tm, Yb, and Lu) very rapidly and yields well-defined complexes that exhibit relatively strong luminescence in aqueous solution. This study reports the synthesis, as well as the structural and photophysical characterization. In addition, nonradiative deactivation of near-infrared luminescence by the ligand N-H oscillators is addressed by comparison of the luminescence from the Yb complexes of en-pypa and its methylated analogue.
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